On Tue, 20 Dec 2016 03:54:48 -0800 (PST), whisky-dave wrote:

**** LED's via ebay, can't quite imagine LEDs running at 3ma I have
some low current ones that aren't very bright they run at 2ma.

Have a cheapo NAS with a blue LED indicator on the front. A night it
would be dazzleling and light up the entire room. I "got at it" and
inserted a series resistor to drop the brightness. In the process I
found it would glow with the leakage current through dry fingers
lightly holding the wire. Eventually settled on 50 uA (micro amps)
and it was still on the bright side.

Been playing with fairy lights and a Raspbery Pi as you do at this
time of year. Raided from a commercial battery operated 240 LED set
I've got 6 chains of 40 parallel connected bright white LEDs, each
chain takes no more than 20 mA flat out = 0.5 mA/LED. The Pi provides
programable, independant PWM control of each chain.

--
Cheers
Dave.